Exemple #1
0
int ssl_add_cert_chain(SSL *ssl, CBB *cbb) {
  if (!ssl_has_certificate(ssl)) {
    return CBB_add_u24(cbb, 0);
  }

  CBB certs;
  if (!CBB_add_u24_length_prefixed(cbb, &certs)) {
    goto err;
  }

  STACK_OF(CRYPTO_BUFFER) *chain = ssl->cert->chain;
  for (size_t i = 0; i < sk_CRYPTO_BUFFER_num(chain); i++) {
    CRYPTO_BUFFER *buffer = sk_CRYPTO_BUFFER_value(chain, i);
    CBB child;
    if (!CBB_add_u24_length_prefixed(&certs, &child) ||
        !CBB_add_bytes(&child, CRYPTO_BUFFER_data(buffer),
                       CRYPTO_BUFFER_len(buffer)) ||
        !CBB_flush(&certs)) {
      goto err;
    }
  }

  return CBB_flush(cbb);

err:
  OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
  return 0;
}
Exemple #2
0
int ssl_add_client_CA_list(SSL *ssl, CBB *cbb) {
  CBB child, name_cbb;
  if (!CBB_add_u16_length_prefixed(cbb, &child)) {
    return 0;
  }

  STACK_OF(CRYPTO_BUFFER) *names = ssl->client_CA;
  if (names == NULL) {
    names = ssl->ctx->client_CA;
  }
  if (names == NULL) {
    return CBB_flush(cbb);
  }

  for (size_t i = 0; i < sk_CRYPTO_BUFFER_num(names); i++) {
    const CRYPTO_BUFFER *name = sk_CRYPTO_BUFFER_value(names, i);

    if (!CBB_add_u16_length_prefixed(&child, &name_cbb) ||
        !CBB_add_bytes(&name_cbb, CRYPTO_BUFFER_data(name),
                       CRYPTO_BUFFER_len(name))) {
      return 0;
    }
  }

  return CBB_flush(cbb);
}
Exemple #3
0
int RSA_marshal_private_key(CBB *cbb, const RSA *rsa) {
  const int is_multiprime =
      sk_RSA_additional_prime_num(rsa->additional_primes) > 0;

  CBB child;
  if (!CBB_add_asn1(cbb, &child, CBS_ASN1_SEQUENCE) ||
      !CBB_add_asn1_uint64(&child,
                           is_multiprime ? kVersionMulti : kVersionTwoPrime) ||
      !marshal_integer(&child, rsa->n) ||
      !marshal_integer(&child, rsa->e) ||
      !marshal_integer(&child, rsa->d) ||
      !marshal_integer(&child, rsa->p) ||
      !marshal_integer(&child, rsa->q) ||
      !marshal_integer(&child, rsa->dmp1) ||
      !marshal_integer(&child, rsa->dmq1) ||
      !marshal_integer(&child, rsa->iqmp)) {
    OPENSSL_PUT_ERROR(RSA, RSA_R_ENCODE_ERROR);
    return 0;
  }

  CBB other_prime_infos;
  if (is_multiprime) {
    if (!CBB_add_asn1(&child, &other_prime_infos, CBS_ASN1_SEQUENCE)) {
      OPENSSL_PUT_ERROR(RSA, RSA_R_ENCODE_ERROR);
      return 0;
    }
    size_t i;
    for (i = 0; i < sk_RSA_additional_prime_num(rsa->additional_primes); i++) {
      RSA_additional_prime *ap =
              sk_RSA_additional_prime_value(rsa->additional_primes, i);
      CBB other_prime_info;
      if (!CBB_add_asn1(&other_prime_infos, &other_prime_info,
                        CBS_ASN1_SEQUENCE) ||
          !marshal_integer(&other_prime_info, ap->prime) ||
          !marshal_integer(&other_prime_info, ap->exp) ||
          !marshal_integer(&other_prime_info, ap->coeff) ||
          !CBB_flush(&other_prime_infos)) {
        OPENSSL_PUT_ERROR(RSA, RSA_R_ENCODE_ERROR);
        return 0;
      }
    }
  }

  if (!CBB_flush(cbb)) {
    OPENSSL_PUT_ERROR(RSA, RSA_R_ENCODE_ERROR);
    return 0;
  }
  return 1;
}
Exemple #4
0
static int eckey_priv_encode(CBB *out, const EVP_PKEY *key) {
  const EC_KEY *ec_key = key->pkey.ec;

  // Omit the redundant copy of the curve name. This contradicts RFC 5915 but
  // aligns with PKCS #11. SEC 1 only says they may be omitted if known by other
  // means. Both OpenSSL and NSS omit the redundant parameters, so we omit them
  // as well.
  unsigned enc_flags = EC_KEY_get_enc_flags(ec_key) | EC_PKEY_NO_PARAMETERS;

  // See RFC 5915.
  CBB pkcs8, algorithm, oid, private_key;
  if (!CBB_add_asn1(out, &pkcs8, CBS_ASN1_SEQUENCE) ||
      !CBB_add_asn1_uint64(&pkcs8, 0 /* version */) ||
      !CBB_add_asn1(&pkcs8, &algorithm, CBS_ASN1_SEQUENCE) ||
      !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) ||
      !CBB_add_bytes(&oid, ec_asn1_meth.oid, ec_asn1_meth.oid_len) ||
      !EC_KEY_marshal_curve_name(&algorithm, EC_KEY_get0_group(ec_key)) ||
      !CBB_add_asn1(&pkcs8, &private_key, CBS_ASN1_OCTETSTRING) ||
      !EC_KEY_marshal_private_key(&private_key, ec_key, enc_flags) ||
      !CBB_flush(out)) {
    OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR);
    return 0;
  }

  return 1;
}
Exemple #5
0
int BN_bn2cbb(CBB *cbb, const BIGNUM *bn) {
  /* Negative numbers are unsupported. */
  if (BN_is_negative(bn)) {
    OPENSSL_PUT_ERROR(BN, BN_R_NEGATIVE_NUMBER);
    return 0;
  }

  CBB child;
  if (!CBB_add_asn1(cbb, &child, CBS_ASN1_INTEGER)) {
    OPENSSL_PUT_ERROR(BN, BN_R_ENCODE_ERROR);
    return 0;
  }

  /* The number must be padded with a leading zero if the high bit would
   * otherwise be set (or |bn| is zero). */
  if (BN_num_bits(bn) % 8 == 0 &&
      !CBB_add_u8(&child, 0x00)) {
    OPENSSL_PUT_ERROR(BN, BN_R_ENCODE_ERROR);
    return 0;
  }

  uint8_t *out;
  if (!CBB_add_space(&child, &out, BN_num_bytes(bn))) {
    OPENSSL_PUT_ERROR(BN, BN_R_ENCODE_ERROR);
    return 0;
  }
  BN_bn2bin(bn, out);
  if (!CBB_flush(cbb)) {
    OPENSSL_PUT_ERROR(BN, BN_R_ENCODE_ERROR);
    return 0;
  }
  return 1;
}
Exemple #6
0
int ECDSA_SIG_marshal(CBB *cbb, const ECDSA_SIG *sig) {
  CBB child;
  if (!CBB_add_asn1(cbb, &child, CBS_ASN1_SEQUENCE) ||
      !BN_marshal_asn1(&child, sig->r) ||
      !BN_marshal_asn1(&child, sig->s) ||
      !CBB_flush(cbb)) {
    OPENSSL_PUT_ERROR(ECDSA, ECDSA_R_ENCODE_ERROR);
    return 0;
  }
  return 1;
}
Exemple #7
0
int RSA_marshal_public_key(CBB *cbb, const RSA *rsa) {
  CBB child;
  if (!CBB_add_asn1(cbb, &child, CBS_ASN1_SEQUENCE) ||
      !marshal_integer(&child, rsa->n) ||
      !marshal_integer(&child, rsa->e) ||
      !CBB_flush(cbb)) {
    OPENSSL_PUT_ERROR(RSA, RSA_R_ENCODE_ERROR);
    return 0;
  }
  return 1;
}
Exemple #8
0
int DSA_marshal_parameters(CBB *cbb, const DSA *dsa) {
  CBB child;
  if (!CBB_add_asn1(cbb, &child, CBS_ASN1_SEQUENCE) ||
      !marshal_integer(&child, dsa->p) ||
      !marshal_integer(&child, dsa->q) ||
      !marshal_integer(&child, dsa->g) ||
      !CBB_flush(cbb)) {
    OPENSSL_PUT_ERROR(DSA, DSA_R_ENCODE_ERROR);
    return 0;
  }
  return 1;
}
Exemple #9
0
int DSA_marshal_private_key(CBB *cbb, const DSA *dsa) {
  CBB child;
  if (!CBB_add_asn1(cbb, &child, CBS_ASN1_SEQUENCE) ||
      !CBB_add_asn1_uint64(&child, 0 /* version */) ||
      !marshal_integer(&child, dsa->p) ||
      !marshal_integer(&child, dsa->q) ||
      !marshal_integer(&child, dsa->g) ||
      !marshal_integer(&child, dsa->pub_key) ||
      !marshal_integer(&child, dsa->priv_key) ||
      !CBB_flush(cbb)) {
    OPENSSL_PUT_ERROR(DSA, DSA_R_ENCODE_ERROR);
    return 0;
  }
  return 1;
}
Exemple #10
0
static int rsa_priv_encode(CBB *out, const EVP_PKEY *key) {
  CBB pkcs8, algorithm, oid, null, private_key;
  if (!CBB_add_asn1(out, &pkcs8, CBS_ASN1_SEQUENCE) ||
      !CBB_add_asn1_uint64(&pkcs8, 0 /* version */) ||
      !CBB_add_asn1(&pkcs8, &algorithm, CBS_ASN1_SEQUENCE) ||
      !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) ||
      !CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) ||
      !CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) ||
      !CBB_add_asn1(&pkcs8, &private_key, CBS_ASN1_OCTETSTRING) ||
      !RSA_marshal_private_key(&private_key, key->pkey.rsa) ||
      !CBB_flush(out)) {
    OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR);
    return 0;
  }

  return 1;
}
Exemple #11
0
static int rsa_pub_encode(CBB *out, const EVP_PKEY *key) {
  // See RFC 3279, section 2.3.1.
  CBB spki, algorithm, oid, null, key_bitstring;
  if (!CBB_add_asn1(out, &spki, CBS_ASN1_SEQUENCE) ||
      !CBB_add_asn1(&spki, &algorithm, CBS_ASN1_SEQUENCE) ||
      !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) ||
      !CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) ||
      !CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) ||
      !CBB_add_asn1(&spki, &key_bitstring, CBS_ASN1_BITSTRING) ||
      !CBB_add_u8(&key_bitstring, 0 /* padding */) ||
      !RSA_marshal_public_key(&key_bitstring, key->pkey.rsa) ||
      !CBB_flush(out)) {
    OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR);
    return 0;
  }

  return 1;
}
Exemple #12
0
int RSA_marshal_private_key(CBB *cbb, const RSA *rsa) {
  CBB child;
  if (!CBB_add_asn1(cbb, &child, CBS_ASN1_SEQUENCE) ||
      !CBB_add_asn1_uint64(&child, kVersionTwoPrime) ||
      !marshal_integer(&child, rsa->n) ||
      !marshal_integer(&child, rsa->e) ||
      !marshal_integer(&child, rsa->d) ||
      !marshal_integer(&child, rsa->p) ||
      !marshal_integer(&child, rsa->q) ||
      !marshal_integer(&child, rsa->dmp1) ||
      !marshal_integer(&child, rsa->dmq1) ||
      !marshal_integer(&child, rsa->iqmp)) {
    OPENSSL_PUT_ERROR(RSA, RSA_R_ENCODE_ERROR);
    return 0;
  }

  if (!CBB_flush(cbb)) {
    OPENSSL_PUT_ERROR(RSA, RSA_R_ENCODE_ERROR);
    return 0;
  }
  return 1;
}
Exemple #13
0
static int eckey_pub_encode(CBB *out, const EVP_PKEY *key) {
  const EC_KEY *ec_key = key->pkey.ec;
  const EC_GROUP *group = EC_KEY_get0_group(ec_key);
  const EC_POINT *public_key = EC_KEY_get0_public_key(ec_key);

  // See RFC 5480, section 2.
  CBB spki, algorithm, oid, key_bitstring;
  if (!CBB_add_asn1(out, &spki, CBS_ASN1_SEQUENCE) ||
      !CBB_add_asn1(&spki, &algorithm, CBS_ASN1_SEQUENCE) ||
      !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) ||
      !CBB_add_bytes(&oid, ec_asn1_meth.oid, ec_asn1_meth.oid_len) ||
      !EC_KEY_marshal_curve_name(&algorithm, group) ||
      !CBB_add_asn1(&spki, &key_bitstring, CBS_ASN1_BITSTRING) ||
      !CBB_add_u8(&key_bitstring, 0 /* padding */) ||
      !EC_POINT_point2cbb(&key_bitstring, group, public_key,
                          POINT_CONVERSION_UNCOMPRESSED, NULL) ||
      !CBB_flush(out)) {
    OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR);
    return 0;
  }

  return 1;
}
Exemple #14
0
/* cbs_convert_ber reads BER data from |in| and writes DER data to |out|. If
 * |string_tag| is non-zero, then all elements must match |string_tag| up to the
 * constructed bit and primitive element bodies are written to |out| without
 * element headers. This is used when concatenating the fragments of a
 * constructed string. If |looking_for_eoc| is set then any EOC elements found
 * will cause the function to return after consuming it. It returns one on
 * success and zero on error. */
static int cbs_convert_ber(CBS *in, CBB *out, unsigned string_tag,
                           char looking_for_eoc, unsigned depth) {
  assert(!(string_tag & CBS_ASN1_CONSTRUCTED));

  if (depth > kMaxDepth) {
    return 0;
  }

  while (CBS_len(in) > 0) {
    CBS contents;
    unsigned tag, child_string_tag = string_tag;
    size_t header_len;
    CBB *out_contents, out_contents_storage;

    if (!CBS_get_any_ber_asn1_element(in, &contents, &tag, &header_len)) {
      return 0;
    }

    if (is_eoc(header_len, &contents)) {
      return looking_for_eoc;
    }

    if (string_tag != 0) {
      /* This is part of a constructed string. All elements must match
       * |string_tag| up to the constructed bit and get appended to |out|
       * without a child element. */
      if ((tag & ~CBS_ASN1_CONSTRUCTED) != string_tag) {
        return 0;
      }
      out_contents = out;
    } else {
      unsigned out_tag = tag;
      if ((tag & CBS_ASN1_CONSTRUCTED) && is_string_type(tag)) {
        /* If a constructed string, clear the constructed bit and inform
         * children to concatenate bodies. */
        out_tag &= ~CBS_ASN1_CONSTRUCTED;
        child_string_tag = out_tag;
      }
      if (!CBB_add_asn1(out, &out_contents_storage, out_tag)) {
        return 0;
      }
      out_contents = &out_contents_storage;
    }

    if (CBS_len(&contents) == header_len && header_len > 0 &&
        CBS_data(&contents)[header_len - 1] == 0x80) {
      /* This is an indefinite length element. */
      if (!cbs_convert_ber(in, out_contents, child_string_tag,
                           1 /* looking for eoc */, depth + 1) ||
          !CBB_flush(out)) {
        return 0;
      }
      continue;
    }

    if (!CBS_skip(&contents, header_len)) {
      return 0;
    }

    if (tag & CBS_ASN1_CONSTRUCTED) {
      /* Recurse into children. */
      if (!cbs_convert_ber(&contents, out_contents, child_string_tag,
                           0 /* not looking for eoc */, depth + 1)) {
        return 0;
      }
    } else {
      /* Copy primitive contents as-is. */
      if (!CBB_add_bytes(out_contents, CBS_data(&contents),
                         CBS_len(&contents))) {
        return 0;
      }
    }

    if (!CBB_flush(out)) {
      return 0;
    }
  }

  return looking_for_eoc == 0;
}
Exemple #15
0
static enum ssl_hs_wait_t do_send_new_session_ticket(SSL_HANDSHAKE *hs) {
  /* TLS 1.3 recommends single-use tickets, so issue multiple tickets in case the
   * client makes several connections before getting a renewal. */
  static const int kNumTickets = 2;

  SSL *const ssl = hs->ssl;
  /* If the client doesn't accept resumption with PSK_DHE_KE, don't send a
   * session ticket. */
  if (!hs->accept_psk_mode) {
    hs->tls13_state = state_done;
    return ssl_hs_ok;
  }

  SSL_SESSION *session = ssl->s3->new_session;
  CBB cbb;
  CBB_zero(&cbb);

  for (int i = 0; i < kNumTickets; i++) {
    if (!RAND_bytes((uint8_t *)&session->ticket_age_add, 4)) {
      goto err;
    }

    CBB body, ticket, extensions;
    if (!ssl->method->init_message(ssl, &cbb, &body,
                                   SSL3_MT_NEW_SESSION_TICKET) ||
        !CBB_add_u32(&body, session->timeout) ||
        !CBB_add_u32(&body, session->ticket_age_add) ||
        !CBB_add_u16_length_prefixed(&body, &ticket) ||
        !ssl_encrypt_ticket(ssl, &ticket, session) ||
        !CBB_add_u16_length_prefixed(&body, &extensions)) {
      goto err;
    }

    if (ssl->ctx->enable_early_data) {
      session->ticket_max_early_data = kMaxEarlyDataAccepted;

      CBB early_data_info;
      if (!CBB_add_u16(&extensions, TLSEXT_TYPE_ticket_early_data_info) ||
          !CBB_add_u16_length_prefixed(&extensions, &early_data_info) ||
          !CBB_add_u32(&early_data_info, session->ticket_max_early_data) ||
          !CBB_flush(&extensions)) {
        goto err;
      }
    }

    /* Add a fake extension. See draft-davidben-tls-grease-01. */
    if (!CBB_add_u16(&extensions,
                     ssl_get_grease_value(ssl, ssl_grease_ticket_extension)) ||
        !CBB_add_u16(&extensions, 0 /* empty */)) {
      goto err;
    }

    if (!ssl_add_message_cbb(ssl, &cbb)) {
      goto err;
    }
  }

  hs->session_tickets_sent++;
  hs->tls13_state = state_done;
  return ssl_hs_flush;

err:
  CBB_cleanup(&cbb);
  return ssl_hs_error;
}
Exemple #16
0
/* cbs_convert_ber reads BER data from |in| and writes DER data to |out|. If
 * |squash_header| is set then the top-level of elements from |in| will not
 * have their headers written. This is used when concatenating the fragments of
 * an indefinite length, primitive value. If |looking_for_eoc| is set then any
 * EOC elements found will cause the function to return after consuming it.
 * It returns one on success and zero on error. */
static int cbs_convert_ber(CBS *in, CBB *out, char squash_header,
                           char looking_for_eoc, unsigned depth) {
  if (depth > kMaxDepth) {
    return 0;
  }

  while (CBS_len(in) > 0) {
    CBS contents;
    unsigned tag;
    size_t header_len;
    CBB *out_contents, out_contents_storage;

    if (!CBS_get_any_ber_asn1_element(in, &contents, &tag, &header_len)) {
      return 0;
    }
    out_contents = out;

    if (CBS_len(&contents) == header_len) {
      if (is_eoc(header_len, &contents)) {
        return looking_for_eoc;
      }

      if (header_len > 0 && CBS_data(&contents)[header_len - 1] == 0x80) {
        /* This is an indefinite length element. If it's a SEQUENCE or SET then
         * we just need to write the out the contents as normal, but with a
         * concrete length prefix.
         *
         * If it's a something else then the contents will be a series of BER
         * elements of the same type which need to be concatenated. */
        const char context_specific = (tag & 0xc0) == 0x80;
        char squash_child_headers = is_primitive_type(tag);

        /* This is a hack, but it sufficies to handle NSS's output. If we find
         * an indefinite length, context-specific tag with a definite, primitive
         * tag inside it, then we assume that the context-specific tag is
         * implicit and the tags within are fragments of a primitive type that
         * need to be concatenated. */
        if (context_specific && (tag & CBS_ASN1_CONSTRUCTED)) {
          CBS in_copy, inner_contents;
          unsigned inner_tag;
          size_t inner_header_len;

          CBS_init(&in_copy, CBS_data(in), CBS_len(in));
          if (!CBS_get_any_ber_asn1_element(&in_copy, &inner_contents,
                                            &inner_tag, &inner_header_len)) {
            return 0;
          }
          if (CBS_len(&inner_contents) > inner_header_len &&
              is_primitive_type(inner_tag)) {
            squash_child_headers = 1;
          }
        }

        if (!squash_header) {
          unsigned out_tag = tag;
          if (squash_child_headers) {
            out_tag &= ~CBS_ASN1_CONSTRUCTED;
          }
          if (!CBB_add_asn1(out, &out_contents_storage, out_tag)) {
            return 0;
          }
          out_contents = &out_contents_storage;
        }

        if (!cbs_convert_ber(in, out_contents,
                             squash_child_headers,
                             1 /* looking for eoc */, depth + 1)) {
          return 0;
        }
        if (out_contents != out && !CBB_flush(out)) {
          return 0;
        }
        continue;
      }
    }

    if (!squash_header) {
      if (!CBB_add_asn1(out, &out_contents_storage, tag)) {
        return 0;
      }
      out_contents = &out_contents_storage;
    }

    if (!CBS_skip(&contents, header_len)) {
      return 0;
    }

    if (tag & CBS_ASN1_CONSTRUCTED) {
      if (!cbs_convert_ber(&contents, out_contents, 0 /* don't squash header */,
                           0 /* not looking for eoc */, depth + 1)) {
        return 0;
      }
    } else {
      if (!CBB_add_bytes(out_contents, CBS_data(&contents),
                         CBS_len(&contents))) {
        return 0;
      }
    }

    if (out_contents != out && !CBB_flush(out)) {
      return 0;
    }
  }

  return looking_for_eoc == 0;
}
Exemple #17
0
int tls13_prepare_certificate(SSL_HANDSHAKE *hs) {
  SSL *const ssl = hs->ssl;
  CBB cbb, body, certificate_list;
  if (!ssl->method->init_message(ssl, &cbb, &body, SSL3_MT_CERTIFICATE) ||
      /* The request context is always empty in the handshake. */
      !CBB_add_u8(&body, 0) ||
      !CBB_add_u24_length_prefixed(&body, &certificate_list)) {
    OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
    goto err;
  }

  if (!ssl_has_certificate(ssl)) {
    if (!ssl_complete_message(ssl, &cbb)) {
      goto err;
    }

    return 1;
  }

  CERT *cert = ssl->cert;
  CBB leaf, extensions;
  if (!CBB_add_u24_length_prefixed(&certificate_list, &leaf) ||
      !ssl_add_cert_to_cbb(&leaf, cert->x509_leaf) ||
      !CBB_add_u16_length_prefixed(&certificate_list, &extensions)) {
    OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
    goto err;
  }

  if (hs->scts_requested &&
      ssl->ctx->signed_cert_timestamp_list_length != 0) {
    CBB contents;
    if (!CBB_add_u16(&extensions, TLSEXT_TYPE_certificate_timestamp) ||
        !CBB_add_u16_length_prefixed(&extensions, &contents) ||
        !CBB_add_bytes(&contents, ssl->ctx->signed_cert_timestamp_list,
                       ssl->ctx->signed_cert_timestamp_list_length) ||
        !CBB_flush(&extensions)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
      goto err;
    }
  }

  if (hs->ocsp_stapling_requested &&
      ssl->ocsp_response != NULL) {
    CBB contents, ocsp_response;
    if (!CBB_add_u16(&extensions, TLSEXT_TYPE_status_request) ||
        !CBB_add_u16_length_prefixed(&extensions, &contents) ||
        !CBB_add_u8(&contents, TLSEXT_STATUSTYPE_ocsp) ||
        !CBB_add_u24_length_prefixed(&contents, &ocsp_response) ||
        !CBB_add_bytes(&ocsp_response, CRYPTO_BUFFER_data(ssl->ocsp_response),
                       CRYPTO_BUFFER_len(ssl->ocsp_response)) ||
        !CBB_flush(&extensions)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
      goto err;
    }
  }

  for (size_t i = 0; i < sk_X509_num(cert->x509_chain); i++) {
    CBB child;
    if (!CBB_add_u24_length_prefixed(&certificate_list, &child) ||
        !ssl_add_cert_to_cbb(&child, sk_X509_value(cert->x509_chain, i)) ||
        !CBB_add_u16(&certificate_list, 0 /* no extensions */)) {
      OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
      goto err;
    }
  }

  if (!ssl_complete_message(ssl, &cbb)) {
    goto err;
  }

  return 1;

err:
  CBB_cleanup(&cbb);
  return 0;
}
Exemple #18
0
static int add_new_session_tickets(SSL_HANDSHAKE *hs) {
  SSL *const ssl = hs->ssl;
  /* TLS 1.3 recommends single-use tickets, so issue multiple tickets in case
   * the client makes several connections before getting a renewal. */
  static const int kNumTickets = 2;

  SSL_SESSION *session = hs->new_session;
  CBB cbb;
  CBB_zero(&cbb);

  /* Rebase the session timestamp so that it is measured from ticket
   * issuance. */
  ssl_session_rebase_time(ssl, session);

  for (int i = 0; i < kNumTickets; i++) {
    if (!RAND_bytes((uint8_t *)&session->ticket_age_add, 4)) {
      goto err;
    }
    session->ticket_age_add_valid = 1;

    CBB body, ticket, extensions;
    if (!ssl->method->init_message(ssl, &cbb, &body,
                                   SSL3_MT_NEW_SESSION_TICKET) ||
        !CBB_add_u32(&body, session->timeout) ||
        !CBB_add_u32(&body, session->ticket_age_add) ||
        !CBB_add_u16_length_prefixed(&body, &ticket) ||
        !ssl_encrypt_ticket(ssl, &ticket, session) ||
        !CBB_add_u16_length_prefixed(&body, &extensions)) {
      goto err;
    }

    if (ssl->cert->enable_early_data) {
      session->ticket_max_early_data = kMaxEarlyDataAccepted;

      CBB early_data_info;
      if (!CBB_add_u16(&extensions, TLSEXT_TYPE_ticket_early_data_info) ||
          !CBB_add_u16_length_prefixed(&extensions, &early_data_info) ||
          !CBB_add_u32(&early_data_info, session->ticket_max_early_data) ||
          !CBB_flush(&extensions)) {
        goto err;
      }
    }

    /* Add a fake extension. See draft-davidben-tls-grease-01. */
    if (!CBB_add_u16(&extensions,
                     ssl_get_grease_value(ssl, ssl_grease_ticket_extension)) ||
        !CBB_add_u16(&extensions, 0 /* empty */)) {
      goto err;
    }

    if (!ssl_add_message_cbb(ssl, &cbb)) {
      goto err;
    }
  }

  return 1;

err:
  CBB_cleanup(&cbb);
  return 0;
}